Cooling device for aerial vehicles



P. IARAY.

' COOLING DEVICE FOR AERIAL VEHICLES.

APPLICATION FILED JUNE 28. 1920.

1 A 1 4,4 1 8 Patented May 2', 1922.

.INVENTOR UNITED S T S,

PATEN OFFICE.

PAUL JARAY, OF FRIEDRICHSHAFEN, GERMANY, ,ASSIGNOB- TO'LUFTSCHIFFBAU ZEIPPELIN GESELLSOHAFT MIT BESCERANKTER HAITUNG, IEAFEN', GERMANY, A GERMAN CORPORATION.

COOLING DEVICE FOR AERIAL" To all whom it may concern. I

Be it known that I, PAUL JARAY, a citizen of the Austrian Republic, residing at Friedrichshafen, Germany, have invented certain new and useful Improvements in Cooling Devices for Aerial Vehicles, (for which .I have filed application in Germany Nov. 16, 1917,) of which the following is a specification.

. My invention refers tow the coolingof the motors and the like in aerial vehicles and it consists substantially in guiding the cooli'ng air in a peculiar manner so as'to lead it on to a radiator disposed in the interior of the shell or body of the flying machine or the like behind 'the'propeller.

Cooling devices have already been proposed which are provided with a single'hood rotating along with the propellerandforming a hemispherical head for the propeller. Now the hoods of this kind which have been ,hitherto used were closed almost completely towards the rear by a dish-shaped lece of sheet iron serving as a support and which revented the fresh air entering the hood roni reaching the interior of tlie body. In other cases the hub of the propeller has been provided with a smaller hood entirely impervious to air and serving for deviating in a favorable manner the-air along the hub of the propeller.

In contradistinction these older devices mypresent invention refers to a .coolingdevice comprising a closed propeller hood and.

an open hood disposed relatively to each other in such a manner that a channel for I p v bination, a propeller, a motor disposed beguiding the air is formed which leads the in a peculiar manner. In consequence t ereof the subyect matter of my inventlon'is a cooling device of the kind aforesaid in which the combination of the closed inner hood known per se and the open outer hood forms an annular nozzle which serves, according Specification of Letters Patent.

distance therefrom.

testimony whereof I afiix my signainterior 5f the flying machine body behind the two propeller hoods and which is adapted, as far as the dimensions are concerned,

to the-area ofthe nozzle outlet.

aringsb for the shaft of pro eller-C ex- Y tending forward'of the body.

v he hub 0 of the pro eller isv provided in a wellknown manner with a closed propeller hood D of parabolic section. ,The lacking point of the shell A is replaced in a wellknown manner by an outer hood N forming the continuation of the shell-covering, said outer hood being also rigidly fixed to the propeller C in any suitable manner. The axial section of the outer hood E represents a body .e confined by stream lines and arranged at such a distance from the propeller shaft that between the two hoods thereQis left a nozzleshaped space havin a circular inlet opening and an annular out et opening. .The outlet or 'FRIEDRICHS-j f In the drawings affixed to this specifica Patented May '2, 1922. Application filed June 28, 1920. Serial No; 392,567. if v opening is provided with turbine vanes F.

Immediately behind the outlet of the nozzle and between this latter and the motor B a radiator G of annular section is arranged. Icla1m:

In a device of the'ki'nd described id conihind said propeller, a-radiatorbetween said propeller and said motor, a closed inner hood. on the' hub of said propeller and an open outer hood surrounding. said inner hood at a y In ture.

PAUL JARA-Y. 

